| .INVESTIGATION OF THE ACTIVE PHASE OF Ag_xSb_yO_z/SiO_2 CATALYST FOR THE CONDENSATION OF ISOBUTENE AND FORMALDEHYDE INTO ISOPRENE[J].分子催化,1989,(Z1): |
| INVESTIGATION OF THE ACTIVE PHASE OF Ag_xSb_yO_z/SiO_2 CATALYST FOR THE CONDENSATION OF ISOBUTENE AND FORMALDEHYDE INTO ISOPRENE |
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| 中文摘要: |
| Chemical Composition,surface distribution of the elements and crystal structure offresh and deactivated Ag_xSb_yO_z/SiO_2 catalysts were investigated investigated by X-ray photoelectronspectroscopy(XPS),scanning Auger microprobc(SAM),electron microdiffraction(EMD)and atomic absorption spectroscopy(AAS).From the experimental results that in-clude the activity evaluation of model catalyst Sb_2O_4/SiO_2 Which Shows the inertness ofSb_2O_4 in Prins reaction,it is reasonable to infer that the active phase ofAg_xSb_yO_z/SiO_2 catalyst for Prins condensation reaction seems to be cubic AgSbO_3.Thereason of the deactivation of the catalyst was discussed.It is suggested that silver componentseems to be unstable in this catalyst. |
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